In Brightest Day, In Blackest Night

From the introduction: In 1299, a new age is dawning, diplomacy happens and you are part of it. Or at least delivering it for those in leadership positions of the great city states that are part of it. But nothing is ever as simple as it seems, with danger and treachery lurking everywhere, even In Brightest day, In Blackest Night... A Dave Arneson’s Blackmoor adventure for heroic level characters.